Fill in the blanks.

1. The main water bodies of the Earth are ____________, ____________, ____________ and ____________.
2. The Lakshadweep, Chagos and Carlsberg groups of islands are the tops of a vast ____________ ____________ ____________ that lies on the floor of the Indian Ocean.
3. The ____________ and ____________ oceans remain frozen for most of the year.
4. ____________ are parts of the oceancompletely surrounded by landmasses.
5. Volcanic eruptions may result in the formation of ____________ lakes.
6. When rivers recede after overflowing their banks, they create ____________.

Tick the sentences that are true. Correct the others.

1. The ocean floor is flat and uniform throughout.
2. Inland seas are a source of fresh water.
3. Lakes cannot support any life forms.
4. Meanders cut off from a river to form oxbow lakes.
5. Rivers flow downwards from a highland.
6. The Nile flows into the Barents Sea.

Multiple choice questions.

1. The percentage of the Earth's surface occupied by water bodies is:
   1. 30%
   2. 45%
   3. 50%
   4. 71%
2. The deepest point on the surface of the Earth is:
   1. The Mariana Trench
   2. Mid-Atlantic Ridge
   3. The English Channel
   4. East African Rift Valley
3. The Atlantic Ocean does not touch:
   1. Africa
   2. Europe
   3. South America
   4. Australia
4. This river does not flow through Asia:
   1. Indus
   2. Seine
   3. Yangtze
   4. Ganga

Oceans and seas have an impact on climate and weather. Give reasons.

Oceans and seas are vital for world trade. Give reasons.